Here's the proper way to delete the Windows.old and $Windows.BT folders: 1  Click Start and type in disk cleanup (no quotes). Wait for the Disk Cleanup utility to show up in the Start menu and click it. 2  A window will appear asking you which hard drive you want to clean up. Choose the C drive (which is default) and click OK.
The A-and B-type HCs are very similar in appearance in the rabbit retina too. Other species may have more than two types of horizontal cell and often these other types are concerned with color coding (see chapter on Horizontal cells by Perlman et al., webvision).
The middle of your eye is filled with a jelly-like substance called the vitreous. The vitreous is clear and allows light to pass directly from the front to the back of your eye. The retina at the back of your eye is a light-sensitive layer which consists of rod and cone cells. These cells collect the light signals and send them as electrical signals to the optic nerve. Rod cells are concentrated around the edge of your retina.